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FROG® Serene Bromine In-Line Cartridge

SKU: 74361

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FROG® Serene Bromine In-Line Cartridge

The FROG® Serene Bromine In-Line Sanitizer System keeps water clean and clear, while reducing bromine and chlorine use by up to 50%. The result is fresh mineral water that is cleaner, clearer, and softer than traditional water care methods.

Introducing the innovation of Time Released Bromine Technology – the Time Release Bromine that works together with FROG minerals in the easy to use Frog Inline System Floating.

What’s in the Box

  • 1 x Serene Bromine Cartridges  
  • Uses lower levels of bromine, up to 50% less than traditional systems.
  • Compatible with ozone systems.
  • Shock treatments required only once per month.
  • Each Bromine cartridge lasts 3-4 weeks depending on use.
  • Each Mineral cartridge lasts up to 4 months.


  • All spas & hot tubs with the In-Line System built-in.



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